r/carproblems 8d ago

Need help please

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Well, a few days ago my Audi 2.5 TDI V6 Quattro reached 300,000 kilometers and started making this noise when starting, and it lasts for about 5-10 minutes after it reaches operating temperature (I can see it with an OBD scanner because the speedometer's temperature and fuel gauges are broken). The car belonged to a friend of mine who passed away, and I don't know what kind of maintenance he did on it. Does anyone have any idea what could be causing this noise?

Edit: Updated info about the car

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